Characteristics of some ferrous and non-ferrous waveguides at 27 Gc/s

Measurements of the attenuations produced by air-filled, rectangular waveguides of brass, copper, aluminium, nickel-silver, nickel, mild-steel, Radiometal, Rhometal and Mumetal have been made at a frequency of 27 Gc/s, and the effective permeabilities of the ferrous materials at this frequency have been estimated from the results.